/*
 * Copyright 2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.dopdf.io;

import javax.servlet.http.HttpServletRequest;

/**
 * The jar resource path build that will return the actual path of the resource in the jar file.  We assume that all our
 * resources are located in the META-INF directory of the jar file.
 *
 * @author Deep Shah
 */
public class JarResourcePathBuilder {

    /**
     * The servlet request reference.
     */
    private HttpServletRequest request;

    /**
     * The constructor that accepts the http servlet request as argument.
     *
     * @param request the servlet request reference.
     */
    public JarResourcePathBuilder(final HttpServletRequest request) {
        this.request = request;
    }

    /**
     * The method that will build the servlet resource path from the request and return that to the caller.
     *
     * @return the String value representing the servlet resource path.
     */
    public String buildPath() {
        final String requestPathWithFilterMapping =
                request.getRequestURI().substring(request.getContextPath().length() + 1);
        final String resourcePath = requestPathWithFilterMapping
                .substring(requestPathWithFilterMapping.indexOf("/") + 1);
        final String actualRequestPath = resourcePath.substring(resourcePath.indexOf("/"));
        return "/META-INF" + actualRequestPath;
    }
}
